JPS6234069Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to improvements to water drains installed in the distribution route between water supply and hot water equipment for sanitary equipment and the same piping to prevent freezing. .

(Prior art) Conventionally, a valve casing having an inflow passage and an outflow passage for fluid has a valve seat and a valve body for preventing backflow, and a vacuum breaker valve and a backflow prevention valve are interlocked to prevent fluid from flowing inside the valve casing. As a device that also serves as a drain for water,
The drawing in Japanese Patent Publication No. 47-33449 (No. 6 in the drawing of the present application)
There is one shown in the figure. To briefly explain the above FIG.
A check valve body 35 is provided on the valve body 35, which is separated from the seat against the flow of fluid in one direction and seated against the flow of fluid in the opposite direction. The vacuum breaker valve 37 is mounted via a valve stem 42 on a valve cylinder body 41 having the valve seat 36, the valve port 39, and the socket 40. It is screwed into a screw hole 43 of the valve housing 33 so that it can move forward and backward.

When draining water to prevent freezing using the valve housing, push the valve stem 42 into the check valve body 35.
The residual water on the outflow passage 32 side can be removed by pushing up, and the water can also be drained by screwing in the valve cylinder body 41. However, in the above case, while the remaining water is drained (at least 2 to 3
(minutes), the valve stem must be pressurized with the tip of a finger, and during this time the tip of the finger is splashed by the cold water flowing out from the valve opening, which not only makes the job painful due to the added cold air, but it is repeated every day. If this happens, there will be inconveniences such as not being able to wait until the remaining water is completely removed and stopping halfway, resulting in freezing. In other cases, if the valve body is screwed in and left unattended and you forget to put it back together, water may be released from the valve opening the next morning, causing water to flood inside the building. Unable to prevent inconvenience.

(Problems to be solved by this invention) The problems to be solved by this invention are to completely drain water to prevent freezing, and at the same time prevent water from getting wet when water is flowing; The goal is to simplify the work of

(Technical means for solving the problem) The technical means taken by the present invention to solve the above problem is that the secondary pressure side is A check valve is supported by a bullet, and a stopper body is formed on the primary pressure side of the valve seat, facing a water stop valve that has a water stop part with a floating valve inside.
A through hole communicating the primary pressure side and the secondary pressure side is provided in the valve chamber housing the floating valve, and another water stop valve is attached to the stopper body using a packing holder with a guide groove.

(Function) When there is a risk of freezing in the flow path of the water pipe system, push in the water stop valve of the stopper body installed in the middle of the flow path,
By retracting the check valve, which faces the valve opening with the water stop part of the water stop valve, the primary pressure chamber and the secondary pressure chamber are communicated through the through hole of the water stop part. It is meant to be drained.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

In the embodiment of this invention, as shown in FIGS. 1 to 8, the plug body 1 has a partition wall 3 that obliquely blocks the flow path 2, and the partition wall 3 includes a primary pressure side chamber 4 and a secondary pressure side chamber 4. A valve port 5 is provided to communicate the pressure side chamber 4a, valve seats 6, 6a are formed on both sides of the valve port 5, and screw holes 7, 7 are provided in the chambers 4, 4a on the same axis as the valve port 5. Place concentrically. A separately provided water stop valve 8 is provided with a water stop part 9 and an action part 10 whose diameters are successively reduced at one end, and a valve chamber 11 is provided in the water stop part 9 to form a floating valve 12 which will be described later.
This valve chamber 11 is connected to the through hole 13 when the water is stopped.
The water stop valve 8 is configured to communicate with the chamber 4 on one side and communicate with the chamber 4a through the through hole 13a on the other side.
A knob 14 for operation is provided at the other end and is screwed into the screw hole 7 by a male thread 15 on the circumferential surface so as to be able to move forward and backward. The check valve 16 is a normal one, and is made to correspond to the valve seat 6a through a plug 17 attached to the screw hole 7a, and a spring 1 is inserted between the check valve 16 and the plug 17.
It is loaded with 8 bullets. The floating valve 12 is formed of foamed resin or other base material into a substantially cylindrical shape, and has a plurality of ribs 19 protruding from its circumferential surface at equal intervals in the axial direction, corresponding to the inner wall of the valve chamber 11, and an upper surface ( In the figure), an annular water stop portion 20 is formed to open and close the through hole 13a. The one shown in FIGS. 4 and 5 is another embodiment in which the stopper main body 1a has a water stop valve 8a facing the check valve 16 at the valve port 5 of the partition wall 3 which partitions the inside at an almost right angle. The water stop valve 8a is provided with a guide groove 21.
The water stop valve 8a is attached to the threaded portion 23 of the stopper body 1a by a packing presser 22 having a packing presser foot 22, and a pin 25 that goes in and out of the guide groove 21 and the locking portion 24 is attached to the circumferential surface of the stop valve 8a. The spring 26 is interposed between the water stop portion 9a and the packing presser foot 22, and by operating the knob 14, the pin 25 is pushed in against the elasticity of the spring 26 while facing the guide groove 21. Press the water stop part 9a against the valve seat 6, and at the same time push back the check valve 16 with the action part 10, and then turn the knob 1 at the pushed-in position.
4 is rotated in a predetermined direction, the pin 25 enters the locking portion 24 of the guide groove 21 and is locked.

In this invention, when the main valve of the water supply is opened and water is supplied from the valves shown in Fig. 1, the fluid moves in the flow path 2 in the direction of the arrow and closes the check valve 16 of the valve port 5 as usual. It is pushed open and supplied to the outflow side, and is supplied to drinking, washing, washing, water heaters, etc. through faucets (not shown). Next, in order to prevent freezing at night, the main valve is shut off, and at the same time, the faucets on the indoor piping are sequentially opened, and outside air is introduced into the indoor piping to break the vacuum. Both of the pressure points 4a become negative pressure.

After that, when the knob 14 is operated in the screwing direction and the water stop valve 8 is screwed in to a predetermined position, the water stop part 9 reaches the valve seat 6 and closes the valve port 5, and at the same time, the operating part 10
The check valve 16 is pushed back and removed from the valve seat 6a, and their relative positions are matched as shown in FIG. 2, so that the chamber 4a on the secondary pressure side and the chamber 4 on the primary pressure side are
The remaining water in the chamber 4a is introduced into the chamber 4 by communicating with the valve chamber 11 through the through hole 13a and the same 13, and is directly discharged from the main valve to the outside. Once the above drainage is completed (about 2 to 3 minutes), it is normal to operate the knob 14 to restore the water stop valve 8, but in the unlikely event that the valve remains the same, the water can be turned on the next morning. When this is done, the water that has reached the chamber 4 tries to enter the valve chamber 11 through the through hole 13 of the water stop part 9, but the floating valve 12 interposed in the valve chamber 11 rises inside the valve chamber 11 due to its buoyancy. However, since the water stop portion 20 at the top presses down the periphery of the through hole 13a to stop water, the fluid is confined within the chamber 4 and water flow to the end of the pipe is blocked. Therefore, the user notices that the water stop valve 8 has stopped water and operates the water stop valve 8 in the opposite direction to open the valve port 5. Further, in the case of other embodiments, the operation may be carried out in accordance with the above.

(Effects) Since this invention is configured as described above, it has the following advantages.

(1) A water stop valve is placed opposite a check valve to the valve port provided in the hot water flow path, and the valve port is closed only when draining water, so that residual water can be removed. Elimination can be ensured.

(2) A valve chamber with a floating valve is provided in the middle of the water stop valve passage, so water can be drained with the valve port closed, and at the same time, water can be drained with each faucet open. To reliably prevent water from overflowing from faucets even if water leaks.

(3) Compared to conventional ones, there is no water leakage when draining water, so there is no problem in installing the stopper body in indoor piping, especially in the middle of piping along corridors.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the main body of the proposed stopper, and Figure 2 is:
An explanatory diagram showing the procedure for draining water, Fig. 3 is an enlarged perspective plan view of a partially broken floating valve, Fig. 4 is an enlarged vertical sectional view of another embodiment, and Fig. 5 is an enlarged side view of the packing presser. 6 are explanatory diagrams of the prior art. Explanation of symbols of main parts, 1, 1a...Plug body,
2...Flow path, 5...Valve port, 8, 8a...Water stop valve,
9, 9a...Water stop part, 11...Valve chamber, 12...Floating valve, 13, 13a...Through hole, 16...Check valve, 2
1... Guide groove, 22... Packing foot, 24...
...Engagement part, 25...pin.

Claims (1)

[Claims for Utility Model Registration] (1) A stopper body in which a check valve 16 and a water stop valve 8 having a water stop portion 9 face each other on both sides of a valve opening 5 that corresponds to the flow 2 in an oblique direction. 1, the water stop valve 8 is provided with a valve chamber 11 with a floating ball 12 interposed therebetween, and a water passage hole connects the primary pressure side chamber 4 and the secondary pressure side chamber 4a around the valve chamber 11. 13 and 13a are provided in communication with each other, and at the same time when the valve port 5 is closed by the water stop part 9 of the water stop valve 8 when draining water to prevent freezing, the chamber 4 side and the chamber 4a side are connected to the water passage hole 13, A water draining device in a water supply pipe system, which communicates through a chamber 4a to remove residual water from a chamber 4a. (2) A water stop part 9a having a valve chamber 11 with a floating ball 12 interposed therein and passage holes 13, 13a communicating with the valve chamber 11 is provided at one end, and an end surface of a packing presser 22 is provided at the other end when water passes through the valve chamber 11. A water stop valve 8a having a corresponding pin 25 is provided, and the water stop valve 8a is connected to the stopper body 1a through the pin 25 and the packing presser foot 22 having a corresponding guide groove 21 and a locking portion 24 when draining water. A water draining device for a water pipe system according to claim 1, characterized in that the device is attached to a water pipe system.